Pharrell Williams, Sara Bareilles will perform live on TODAY

As part of TODAY's summer Toyota Concert Series, we've lined up not one but two chart-topping singer-songwriters to perform their feel-good music live on the plaza.

Kicking things off on Thursday, June 5, is Pharrell Williams, the man behind the summer smash "Happy."

Make sure to send us your concert pics and tweets to #PharrellTODAY.

But the fun doesn't there. On Friday, June 6, popular artist Sara Bareilles will sing songs from her Grammy-nominated album "The Blessed Unrest."

Share your photos and more with #SaraBareillesTODAY.

Fans and visitors are encouraged to come to the plaza for the live performances. Viewing is on a first-come, first-served basis outside TODAY's window-on-the-world studio at 49th Street and Rockefeller Plaza in New York City. Fans should arrive by 6 a.m. for best viewing.